package com.springframework.beans.factory.config;

import org.springframework.lang.Nullable;

/**
 * @Author 虎哥
 * @Description //TODO
 * 要带着问题去学习,多猜想多验证
 **/
public interface MySingletonBeanRegistry {
    @Nullable
    Object getSingleton(String beanName);
    boolean containsSingleton(String beanName);
    Object getSingletonMutex();
}
